Effective photocatalytic disinfection of Escherichia coli by one-dimensional Ag_2V_4O_(11) nanowires under solar light irradiation

摘要

In this paper, one-dimensional Ag_2V_4O_(11) nanowires were prepared by a facile method and developed as a novel visible-light-sensitive photocatalyst for the disinfection of Escherichia coli (E. coli) under solar light irradiation. The as-prepared Ag_2V_4O_(11) had uniform wire-like structure with large specific surface area and good visible-light absorption performance. Experimental results indicated that almost all (99.9%) of the initial bacteria were killed after 30 min reaction in the presence of 1 mg/mL Ag_2V_4O_(11) under solar light irradiation. The photocatalytic mechanism was studied by active species trapping experiments, revealing that the hydroxyl radicals (OH) played key roles in the inactivation of bacteria. This study provides a potential effective Ag_2V_4O_(11) nanowire photocatalyst for water purification and other applications.